X0306 4 2019-02-27 0 0001675033 Great Elm Capital Corp. GECC 0001429074 Mast Capital Management, LLC 31 ST. JAMES AVENUE 6TH FLOOR BOSTON MA 02116 0 0 1 0 0001429076 Steinberg David J. 31 ST. JAMES AVENUE 6TH FLOOR BOSTON MA 02116 0 0 1 0 Common Stock 2019-02-27 4 S 0 10000 8.3794 D 2293117 I See footnotes Common Stock 2019-02-28 4 S 0 11400 8.3302 D 2281717 I See footnotes Common Stock 2019-03-01 4 S 0 40000 8.4181 D 2241717 I See footnotes Represents shares of Common Stock, $0.01 Par Value, of Great Elm Capital Corp., a Maryland corporation (the "Common Stock" and the "Issuer"), sold by the following Mast Accounts: (i) 9,385 shares of Common Stock sold by Mast Select Opportunities Master Fund, L.P. and (ii) 615 shares of Common Stock sold by Mast Admiral Master Fund, L.P. The price reported in Column 4 is not a weighted average price. These shares were sold in a single transaction at price of $8.3794 on February 27, 2019 Represents shares of Common Stock held directly by the Mast Accounts, for which MAST Capital is the investment manager, including: (i) 2,156,520 shares held by Mast Select Opportunities Master Fund, L.P and (ii) 136,597 shares held by Mast Admiral Master Fund, L.P. As the investment advisor of certain private investment funds (collectively, the "MAST Accounts"), including those disclosed herein, MAST Capital Management, LLC ("MAST Capital") may be deemed to be the beneficial owner of the shares of Common Stock held by the MAST Accounts disclosed herein. MAST Capital also has the right to an asset-based fee relating to the MAST Accounts. Pursuant to Rule 16a-1, MAST Capital disclaims such beneficial ownership, except to the extent of its pecuniary interest therein. Mr. Steinberg may also be deemed to beneficially own the shares of Common Stock beneficially owned (or deemed to be beneficially owned) by MAST Capital, as he is the principal of MAST Capital. Pursuant to Rule 16a-1, Mr. Steinberg disclaims such beneficial ownership, except to the extent of his pecuniary interest therein. Represents shares of Common Stock, $0.01 Par Value, of Great Elm Capital Corp., a Maryland corporation (the "Common Stock" and the "Issuer"), sold by the following Mast Accounts: (i) 10,699 shares of Common Stock sold by Mast Select Opportunities Master Fund, L.P. and (ii) 701 shares of Common Stock sold by Mast Admiral Master Fund, L.P. The price reported in Column 4 is not a weighted average price. These shares were sold in a single transaction at price of $8.3302 on February 28, 2019 Represents shares of Common Stock held directly by the Mast Accounts, for which MAST Capital is the investment manager, including: (i) 2,145,821 shares held by Mast Select Opportunities Master Fund, L.P and (ii) 135,896 shares held by Mast Admiral Master Fund, L.P. Represents shares of Common Stock, $0.01 Par Value, of Great Elm Capital Corp., a Maryland corporation (the "Common Stock" and the "Issuer"), sold by the following Mast Accounts: (i) 37,618 shares of Common Stock sold by Mast Select Opportunities Master Fund, L.P. and (ii) 2,382 shares of Common Stock sold by Mast Admiral Master Fund, L.P. The price reported in Column 4 is not a weighted average price. These shares were sold in a single transaction at price of $8.4181 on March 1, 2019 Represents shares of Common Stock held directly by the Mast Accounts, for which MAST Capital is the investment manager, including: (i) 2,108,203 shares held by Mast Select Opportunities Master Fund, L.P and (ii) 133,514 shares held by Mast Admiral Master Fund, L.P. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2), (7), and (10) to this Form 4. MAST CAPITAL MANAGEMENT, LLC, By: /s/ David J. Steinberg, Name: David J. Steinberg, Title: Authorized Signatory 2019-03-01 /s/ David J. Steinberg 2019-03-01